JP7378774B2 - bellows type tent - Google Patents

Description

The present invention relates to a bellows-type tent that is equipped with a bellows-type expansion and contraction mechanism and is commonly used in warehouses, workshops, and the like.

Generally, bellows-type tents are used for simple warehouses, painting workshops, hangars (garages), etc., and are also called telescoping tent houses. An inverted U-shaped telescoping frame that integrates the pillars and the beams that connect the pillars on both sides is arranged at intervals in the direction of the ridge of the house, and has a parallel link type telescoping mechanism. By connecting them, the length of the bellows can be changed as appropriate.

These bellows-type tents are equipped with casters at the lower end of each extendable frame, and when the length of the bellows is shortened, the hem of the tent sheet placed over the frame sag. It is known that a guide wire is provided along the lower end or hem of the tent sheet to prevent the tent sheet from getting caught (Patent Document 1).

In addition, a bar (rod-shaped) material made of fiber fabric connected by bendable hinges and attachment parts is provided so as to span the bottom of each frame of the bellows-type tent, and while this bar material is folded outward, the hem of the seat It is known to push out the section outward from the rail to prevent entrainment (Patent Document 2).

Japanese Patent Application Publication No. 60-62380 Japanese Patent Application Publication No. 2013-133629

However, in the method of disposing the guide wire along the lower end or hem of the tent sheet described in Patent Document 1 mentioned above, a part of the hem of the tent sheet is caught by the guide wire, and the outside of the pillar part is Since it is only held on the same plane as the sides, it does not have the effect of lifting the hem of a tent sheet with a long hem, and the problem of the hem being easily caught in casters could not be satisfactorily solved.

Furthermore, as shown in Patent Document 2 and FIG. 9, when a bar (rod-shaped) member 23 connected at a bendable portion is attached to one side of a pair of frames 22 of a bellows-type tent, the bellows can be expanded and contracted. When this happens, the entire base 10 and frame 22 shake and wobble in the direction of the arrow, making it impossible for the casters 9 to run smoothly, making it impossible to retract (fold) or extend the bellows-type tent stably and smoothly. There is a problem.

In addition, since the bar material 23 disclosed in Patent Document 2 has a hinge portion made of fiber fabric, the load supporting capacity of the attachment portion to the frame 22 is weak, and it supports the load from the hem of the tent sheet. As a result, the horizontal state of the bar material 23 attached to the lower part of the frame 22 cannot be stably maintained. That is, the bar material 23 described above also has the problem that the hinge portion cannot support the load of the sagging hem of the tent sheet, and the bent portion of the bar material 23 tilts downward and hangs together with the tent sheet. ing.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and prevent the hem of the tent sheet in a bellows-type tent from sagging, thereby providing a sufficient anti-entanglement function and, in addition, when folding or extending the bellows-type tent. The objective is to create a bellows-type tent that can be smoothly extended and retracted with little resistance.

In order to solve the above problems, the present invention includes a plurality of inverted U-shaped frames that integrate a pair of column parts and a beam part that connects the upper parts of these frames, and a plurality of inverted U-shaped frames that are spaced apart from each other in multiple layers. a parallel link mechanism that connects the plurality of inverted U-shaped frames in a bellows-like manner to the lower ends of the pillars; and a base with casters that movably supports the lower ends of the pillars of the plurality of inverted U-shaped frames. A bellows-type tent comprising a base, which connects the adjacent bases, and is provided with a link arm that is bent in a V-shape with the space between the inverted U-shaped frames narrowed and protrudes to the outside of the base. That's what I did.

In the bellows-type tent of the present invention configured as described above, when the distance between the inverted U-shaped frames narrows, the link arms bend into a V-shape to reduce the angle. At this time, since the link arms connect the adjacent bases, they are connected at a position closer to the caster track than the pillars of the inverted U-shaped frame. Therefore, since the base receives the frictional resistance force along the track in the direction of increasing the distance between adjacent bases, the base, casters, and inverted U-shaped frame are not swayed when the bellows expands and contracts. Therefore, it becomes a bellows-type tent that can be smoothly expanded and contracted.

In the bellows-type tent of the present invention, when the spacing between the inverted U-shaped frames narrows when the bellows retract, the link arms can bend into a V-shape and protrude significantly to the outside of the base; As mentioned above, due to the stable V-shaped bending action of the link arm supported by the base that does not wobble, the slack in the tent sheet is pushed outward, the slack in the hem is sufficiently eliminated, and the tent sheet is Curling of the hem portion is sufficiently prevented.

In order to more reliably obtain the above-mentioned effects, it is preferable that the link arm is a link arm that particularly connects the central portions of the base to prevent the base and the casters from swinging.

In addition, in order to reduce the resistance when retracting or extending the bellows-type tent, both ends of the link arms are connected to adjacent bases with pins so that they can rotate freely. Alternatively, the V-shaped bent portion of the link arm is bent through a hinge, and furthermore, the V-shaped bent portion of the link arm is provided with a guide roller on the axis of the hinge. Preferably, it is a portion.

Furthermore, the link arm, which is rotatably pin-connected to the base as described above, supports the load of the hem of the tent sheet in a stable posture from the base with the pin that serves as the axis of rotation, so it forms a V-shaped The bent portion of the tent sheet reliably pushes out the slack of the tent sheet outward from the base, and the slack of the hem can be sufficiently eliminated.

In addition, by providing a guide arm at the bottom of the pillar section that keeps the hem of the tent sheet always protruding outward from the base, the slack in the hem of the tent sheet can be made as small as possible in advance. This makes it possible to more reliably prevent the bellows-type tent from getting caught when folded.

In this invention, the link arms of the bellows-type tent are provided so as to connect the adjacent bases on the trajectory of the casters, so that the bases and casters do not rotate but swing in a horizontal plane. The bellows type tent has a sufficient function to prevent the hem from getting caught by preventing the tent sheet from sagging in a bellows type tent, and there is less resistance when folding or extending the bellows type tent, allowing for smooth expansion and contraction. It has the advantage of being a tent.

A side view showing the embodiment and showing the bellows-type tent with the tent sheet removed. Enlarged view of main parts of Figure 1 Plan view of Figure 2 Front view of Figure 1 Enlarged view of main parts of Figure 4 A side view showing the bellows-type tent in Figure 1 in a retracted state. A plan view illustrating the state in which the bellows-type tent is partially retracted in Figure 3. A plan view illustrating the state in which the bellows-type tent in Figure 3 is completely retracted. An explanatory diagram of the main parts of the bellows-type tent shown in Patent Document 2

Embodiments of the invention will be described below based on the accompanying drawings.
As shown in FIGS. 1 to 3, the bellows-type tent of the embodiment has a set of two rod-shaped frames 1a and 1b (see FIG. 4) as pillar parts 1, and a beam part 2 connecting the upper parts of the pair of pillar parts 1. are provided to constitute an inverted U-shaped frame 3, and these inverted U-shaped frames 3 are arranged in multiples at intervals in the direction of the ridge of the substantially rectangular dome-shaped tent (see FIG. 1). The tent sheet 4 is also provided with a parallel link mechanism 5 that connects the plurality of inverted U-shaped frames 3 with variable intervals, and covers the plurality of inverted U-shaped frames 3 up to the lower ends of the pillars 1 in a bellows-like manner.

The parallel link mechanism 5 of the embodiment is a mechanism that combines a plurality of parallel cranks that are X-shaped link units, and is also called a rage tongue. The lower part of the X-shaped thin plate frame 5a is connected to the lower part of the column 1 at a fixed position with a pin 6, and the upper part of the column 1 is provided with a guide for a predetermined distance in the longitudinal direction of the column 1. The bellows-type tent can be expanded and contracted to the left and right (FIG. 1) by connecting them with slide pins 8 that are slidable in the slits 7, and widening or narrowing the spacing while keeping the pillars 1 parallel to each other.

Further, a base 10 with casters 9 that movably supports the lower end of the column part 1 is provided, and the central parts of the adjacent bases 10 are joined by a link arm 11 with a pin 13, and the connection position by this joint is on the casters. 9 is directly above the guided track 12.
In this way, the link arm 11 is connected at a position closer to the track 12 of the caster 9 than the column part 1 of the inverted U-shaped frame 3, and is bent into a V-shape with the above-mentioned interval of the inverted U-shaped frame 3 narrowed. It is provided with a required length to protrude outside of the base 10. When the bellows-type tent expands and contracts, the frictional resistance from the joint portions of the pins 13 and 14 of the link arm 11 is received along the track 12, so that the base 10 does not swing.

The link arm 11 is made of narrow iron plates or the like and joined together at one end by a rotatable pin 14, so that the bending angle of the V-shape can be changed wide or narrow, and the axis of the hinge can be changed. A rotatable guide roller 15 in the form of a cap nut is attached to the constituting pin 14 so as to smoothly guide the tent sheet 4 by sliding contact therewith.

Other forms of link arms include using a narrow steel plate similar to the above, and mounting the plate surface vertically, connecting the base 10 with a pin at one end, or using a hinge shaft as a hinge or similar to a hinge. It may also be equipped with a rotating shaft.

Further, separate from the link arm 11, a guide arm 16 is provided to always project the hem of the tent sheet 4 outward from the base 10 to minimize slack.

As shown in FIGS. 1 and 4, both end surfaces of the bellows-type tent in the ridge direction may be opened as appropriate or at all times, and may be openable and closable with a sheet shutter 17, for example. The end face on one side (the left side in FIG. 1) is closed with a fixed part 19 that is integrated with the fixed inverted U-shaped frame 3, and the other end face is a drive part 20, and a drive wheel 21 with an electric motor is used to drive the track. The bellows-type tent can be expanded and contracted by moving the top 12 back and forth.

The pillar section 1, which is arranged upright, uses a set of two cylindrical rod-shaped metal pillar materials such as iron, which are joined together into an integral pillar with a truss structure. The pair of pillars 1 are spaced apart from each other by the width of both sides of the bellows-type tent, and a set of two metal rod-shaped frames 2a, 2b are trussed at the upper ends of the pillars 1. The beam parts 2 that are structurally joined together constitute an "inverted U-shaped frame" 3, which is generally referred to as a substantially U-shaped frame that opens downward, a semicylindrical frame, and the like.

As shown in FIG. 5, the caster 9 fixed to the lower end of the column 1 is a door roller type caster fixed or rotatably attached to the base 10 directly or indirectly via a mounting seat (not shown). An example is the form. That is, the caster 9 is shown in which a wheel 9b is attached to a pair of forks 9a via an axle and a bearing (not shown). The wheels 9b have flanges on one or both sides of the edges, making it easier for the steel cross section to be guided by the inverted T-shaped track 12, and stabilizing the entire load even if it is a large bellows-type tent. I'm trying to support you. The track 12 is fixed to a concrete floor or the like with bolts or the like. In addition, the code|symbol 20a in the figure is. This is a cover for the drive wheel.

The base 10 on which the casters 9 are attached has the strength to be fixed integrally with the inverted U-shaped frame 3, and is made of steel or other hard metal material such as a plate, box, or frame, and is Well-known fixing means such as welding or joints can be used.

The link arm 11 rotatably pin-joined to the base 10 supports the tent sheet 4 while supporting the load of the hem of the tent sheet 4 by the pin 13 supported by the base 10 in a stable posture. Push the slack out to the outside and fully eliminate the slack in the hem.

As an example of a pin connection suitable for supporting the load of the link arm 11, for example, a bolt is screwed into the top surface of the base 10 and fixed at a constant height, and at that time, there is no space between the bolt head and the link arm 11. This is a pin connection in which the link arm 11 is held horizontally rotatably through a washer or sleeve.

As shown in FIG. 6, when the spacing between the inverted U-shaped frames 3 narrows when the bellows retract, the link arm 11 bends into a V-shape according to the spacing, as shown in FIGS. 7 and 8. and protrudes largely to the outside of the base 10.

When the bellows are extended, the situation is opposite to the above, and the tent sheet 4 can be stretched horizontally. When the bellows expands and contracts like this, in any case, the frictional resistance from the joints of the pins 13 and 14 of the link arm 11 is applied in the direction of widening or narrowing the distance between the adjacent bases 10. However, such force is distributed to the left and right without causing the base 10 to swing along the track 12.
That is, when linking adjacent bases 10, the link arm 11 is located close to the outermost column 1b of the inverted U-shaped frame 3 or the track 12 of the caster 9 located inside. By selectively arranging the connecting positions, the base 10 can more stably receive the frictional resistance force from the link arms 11 along the track 12.

Therefore, the base 10 and the inverted U-shaped frame 3 move without wobbling, and the slack in the hem of the tent sheet 4 pushed outward from the link arm 11, which has been deformed into a large V-shape, is sufficiently eliminated, and the tent The hem of the seat 4 is reliably prevented from getting caught in the caster 9 and the track 12.

1 Column parts 1a, 1b Bar-shaped frame 2 Beam parts 2a, 2b Bar-shaped frame 3 Inverted U-shaped frame 4 Tent sheet 5 Parallel link mechanism 5a Thin plate-shaped frame 6, 13, 14 Pin 7 Guide slit 8 Slide pin 9 Caster 9a Fork 9b Wheel 10 Base 11 Link arm 12 Track 15 Guide roller 16 Guide arm 17 Sheet shutter 19 Fixed part 20 Drive part 20a Cover 21 Drive wheel 22 Frame 23 Bar material

Claims (4)

A plurality of inverted U-shaped frames that integrate a pair of pillars and a beam that connects their upper parts,
a parallel link mechanism that arranges the inverted U-shaped frames in multiple spaces at intervals and connects them so that the intervals can be changed;
a tent sheet that covers the lower ends of the pillars of the plurality of inverted U-shaped frames in a bellows shape;
a base with casters that movably supports the lower end of the column,
A link arm is provided that connects the center portions of the adjacent bases, the link arm having a V-shaped bent portion protruding to the outside of the base with the space between the inverted U-shaped frames narrowed. , a bellows-type tent in which both ends of the link arm are held by pin joints to the adjacent bases so as to be horizontally rotatable. 2. The bellows-type tent according to claim 1 , further comprising a guide arm provided at a lower portion of the pillar portion to keep the hem portion of the tent sheet always protruding outward from the base. The bellows-type tent according to claim 1 or 2 , wherein the V-shaped bent portion of the link arm is a bent portion via a hinge. The bellows-type tent according to any one of claims 1 to 3 , wherein the V-shaped bent portion of the link arm is a portion provided with a guide roller on the axis of the hinge.

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